Sand-molding machine



(No Model.)

S. `J. ADAMS SAND MOLDI NG MACHINE.

Patented Nov Pfaff N, Pneus Phmmhugnpnnr: wasmpgmvc UNITED STATES PATENT OEETCE.

S. JARVIS ADAMS, OF PITTSBURG, PENNSYLVANIA.

SAND-Momma MACHlNE.

SPECIFICATION forming part of Letters Patent No. 374,031, dated November 29, 1887.

Application med Fenway 9, issn. serial No. 191,322.

To all whom it may concern.-

Be it known that I, S. JARvrs ADAMs, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Apparatus for Mak1ng Sand Molds by Jarring, (Gase Ag) and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to the apparatus used for the formation of sand molds, and has spe cial reference to that class of apparatus employed in forming sand molds by what is termed the jarring process, its obj ect being to simplify the construction of the jarring apparatus and to provide simple and efficient gu1de apparatus to direct the movement of the flask or core-box during jarring.

Inm the apparatus heretofore employed in forming large molds by the jarring process a jarrmg table or stand has been employed, this jarring-stand being raised by suitable reciprocating apparatus and being guided in its movement by suitable guide apparatus on the frame of the j arring-machine, and it has been found that this jarring apparatus was liable to get out of true line, and, on account of the b earmgs being exposed to the sand, was very hable to wear, in vwhich case the side motion of the table effected injuriously the formation of perfect molds. The apparatus was also eX- pensive-on account of its complication, and

necessari] yveryheavyand cumbersome to withstand the concussion, and slow in operation. By my invention these objections are entirely 0vercome,.as I am enabled to obtain the power necessary to raise the flask or core-box and drop it by much simpler apparatus, this apparatus being preferably supported entirely above the frame or table on which the jarring operation takes place, and not beingexposed to wear or injury from any of the causes above set forth. Iam also enabled to guide the movement of the flask or core-box by such simple means that there is but little opportunity of their getting out order.

To this end my invention consists, generally, in combining with the flask or core-box, having a block at the base thereof, a'jarring-block on which the flask or core-box is dropped in imparting the jarring thereto, and lifting and dropping mechanism from which the flask is hung and by which it is lifted and dropped upon the jarring-block.

(No model.)

It also consists in certain improvements in the construction of the apparatus, as hereinafter set forth. v

To enable others skilled in the art to make and use myinvention, Iwill describe the same more fully, referring to the accompanying drawings, in which- Figure l is a perspective view illustrating my invention. Fig. 2 is aside view thereof, showing the flask raised and in the position for dropping. Fig. 3 is a vertical section illustrating the carrier connecting the lifting and dropping mechanism and the flask. Fig. 4 is a cross-section -on the line x x, Fig. 2, illustrating the guide apparatus. Fig. 5 is a View of the mold made, and Fig. 6 illustrates another form of guide. l

Like letters of reference indicate like parts in each.

rIhejarring-block a is generally formed of metal, and is firmly supported in any suitable manner, being made of suitable height to bring the work to the height desired by the workman according to the size or form of mold to be made. v

'The ilask b shown is the ordinary one-part flask for the formation of wagon-boxes, pipeballs, and similar tubular articles. At the base of the flask is the flask-block c, which carries the pattern c', this block being secured to the flask by means of a set-screw, hook, or other similar device, and receiving the blow as the flask is dropped, as fully shown in Letters Patent No. 243,482, granted to me .I une 28, 1881, this flask-block in this manner retaining the pattern in proper position within the flask. Extending up back of the course of the iiask as it rests on the jarring-block a is the guideframe d, this guide-frame in its preferred form being provided with the vertical guides e, which are preferably formed of V-shaped metal bars secured to the frame d, these bars being stationary and preferably having means for adjusting them, so that they are in an exact` l vertical line.

The flask I) is provided with the guides f, which guides extend down the back of the flask and have grooves formed therein corresponding in shape to theguides e, so that when the flask is pushed against the guide-frame d the guidesf will engage with the guides c, and as the flask is raised and dropped this guide apparatus will serve to guide the flask perfectly in its movement.

Other forms of this guide apparatus may be employed, such as that shown in Fig. G, in which guide-plates extend out at an angle to each other and the flask can be pushed into the space between these guide-plates. the body of the flask pressing against the guide-plates and its movement being controlled thereby.

My improved guide apparatus may also be employed in guiding the movement ofthe flask or core-box when withdrawn from the mold or core formed, or when withdrawing the mold formed from the pattern. Mounted above the jarring-block a is the lifting` and dropping mechanism, this mechanism, as shown, consisting of the shaft g, mounted in suitable bearings and carrying at its end directly above the center of the jarring-block a a crank or cam, Il, to which is connected the bar or rope z', the bar being either secured to a suitable cam boX or plate, where the cam is employed, or pivoted directly to the crank, where the crankarm is employed. This bar or rope yi extends down through suitable guides, as at k, and has Vat its lower end the yoke Z, by means of which it is caused to engage with the flask b.

The yoke Z, when used, may be formed of one piece, but is preferably formed of two arms, m m, pivoted together at the base of the bar f, these arms being provided with the hook or lip a, which fits over the handle or pin p on the flask, thus connecting the jarring apparatus to the flask, and upon the rotation of the shaft g the bar is raised thereby, thus, through the yoke Z, lifting the flask and its block above thejarring-bloek or anvil a, and letting it drop on the said anvil, and in this manner imparting the jar to the sand within the flask, gradually packing the sand and forming the mold.

The number of jars imparted to the flasl depends upon the height to which the flask is raised, where it is dropped a long distance two or tllrecjars being sufficient for the purpose, but where it is dropped but a short distance from fifteen to twenty being necessary. The handles l) are generally formed about the center of the flask, in order to facilitate the turning over of the flask to remove the pattern, the flask being swung over on these pivot pins or handles while it is supported by the yoke l, and after placing the bottom board, 7', under it lowered onto the jarring-block a.

To hold the flask in a vertical position and prevent it from swinging forward during the jarring operation, I place the pins s thereon near the top o f the flask, against which the yoke strikes, and so prevents the upper portion of the flask from swinging forward.

In forming the molds by my improved jarri ngapparatus, the flask-block to which the pat tern is secured is attached to the base of the flask, the flask being filled with sand in the ordinary manner, and, if desired, the reservoirt for holding sand being placed on the top thereofto provide a surplus ofsand which acts as a supply and weight in packing the sand Y below it, as is well known in practicing this jarring process. The yokel of the lifting and dropping mechanism is then swung over the flask, the hooks or lips thereof caused to A engage with the handles or pivot-pins, and the apparatus is ready for forming the mold. As the mold is raised by the lifting and dropping mechanism, the workman presses it over against the guide-frame d, and the guides c and f on the guide-frame and flask engage with each other, so guiding the movement of the flask as it is raised and as it drops on the jarring-block a. After a sufficient number of jars have been given tothe flask to sufficiently pack the sand therein, the flask is lowered onto the jarring-block, and, if the reservoir has been employed therewith, the reservoir with the surplus sand is removed. The stand or bottom board is then placed on top of the flask and the moldlifted off the pattern ,being guided in its movement by the guides c and f, or the flask turned over, being supported by the arms of the yoke, and lowered onto this bottom board. The flask-block c, to which the pattern c is secured, is then detached from the flask and the pattern drawn out thereby, and the core is inserted in the mold, when itis ready for casting.

My improved apparatus may be employed in forming many different kinds of molds, being applicable as well to the two-part flask as to the onevpart flask, as shown, and the form of connection between the flask and lifting and dropping mechanism may also be changed, the essential feature being that the lifting and dropping mechanism engages directly with the flask, and that thejarring-table heretofore in use is done away with.

Where, as in the preferred form of my invention, the lifting and dropping mechanism is supported entirely above the flask, there is no opportunity of its becoming worn by the entrance of sand or grit therein.

The apparatus is much simplied both in the construction of the jarring apparatus and means of guiding the flask during jarring operation, and for these reasons the apparatus is much cheaper in construction than the ordinary apparatus heretofore in use. Power is also saved, as the weight of the lifting and dropping mechanism is greatly reduced, a light wire rope being all that is necessary to lift the flask in jarring, and more and better work is done.

Vhat I claim as my invention, and desire to secure by Letters Patent, is'- l. In molding apparatus, the combination of a jarring-block, lifting and dropping mechanism, and a flask having a flask-block at the IOO IOS

IIO

base thereof, said ask being hung directly from the lifting and dropping mechanism and I adapted to be lifted thereby and dropped upon the jarringblock, substantially as and for the purposes set forth..

2. In molding apparatus, the combination of a jarring-block, lifting and dropping mechanism provided With a depending yoke, and a flask having a flask-block at the base thereof, said ask being hung froln said yoke and adapted to be lifted and dropped upon said jarring-block, substantially as and for the purposes set forth. l y

3. In molding apparatus, the combination of a jarring-block, a fiask having a ask-block at the base thereof', and lifting and dropping mechanism provided with a reciprocating bar and a depending yoke formed ofarms pivoted to said bar and engaging with said flask, substantially as and for the purposes set forth.

4.-. In molding apparatus, the combination of the jairingblock, the flask provided with the handles or pins p and lug s, and the lifting and dropping mechanism having the yoke Z, providedwith ln gs or loops engaging with sald pins, substantially as and for the purposes set forth.

5. In apparatus for forming molds by jarring, the combination, with a stationary jarring-block and a flask, of a vertical guide ex tending up behind the course of the ask, and against which it rests for directing the movenient of the lflask during jarring, substantially as and for the purposes set forth.

In testimony whereof I, the said S. JARVIS ADAMS, have hereunto set my hand.

' S. JARVIS ADAMS.

Witnesses:

J AMES I. KAY, J. N. COOKE. 

